秒表检定装置GDS-50

1. 范围

本规程适用于时间检定仪(以下简称检定仪)的检定、后续检定和使用中检验。检定仪包括电子毫秒计检定仪，秒表检定仪，电秒表检定仪。这三种检定仪可能是相互独立的，也可能是合为一体的，GDS-50为一体式时间检定仪。

2． 概述

时间检定仪GDS-50的基本功能是直接输出一种或几种标准的时间间隔信号。该间隔信号除指针式电秒表检定仪以外，其它均由检定仪内的晶体振荡器经过分频得到各种不同的标准时间间隔信号，通过控制电路对电子毫秒计、数字电秒表和各种秒表进行直接检定。指针式电秒表检定仪由市电50Hz频率分频得到。

Introduction

The calibrator is a precision instrument calibrating mechanical stopwatch, electronic stopwatch, and 405/407/408/415/417 type pointer electric stopwatch. The SF2001 stopwatch calibrator is compliant with the stopwatch calibration procedure JJG 237-2010 issued by the National Metrological Bureau. It could be used at metrological department at all levels, factory, institutions and all research institutes to calibrate electric stopwatch (405,407,408,415/417), mechanical stopwatch and digital quartz electronic stopwatch. The instrument is fully digitally controlled, high reliability,high accuracy, complete functions, convenient operation, and strong anti-interfere
ability.
GDS-50 stopwatch calibrator and its accessories:
1)GDS-50 stopwatch calibrator       1 piece
2) Three-core power cord               1 piece
3) Dual banana plug test lead         2 pieces
4) BNC-banana test lead                 1 piece
5) Soft copy of User’s Guide            1 piece

Main Parameter

1.1 Crystal Oscillator
Nominal frequency: 10MHz
Daily aging rate: ≤5×10 -9 /day
Second stability: ≤5×10 -10 /s
Accuracy: ≤1×10 -7
Warming-up time: over 2 hours
1.2 Calibrate mechanical stopwatch and electronic stopwatch (T0 is inputted calibration period of time)
Input range: T 0 :1s-99999s
Accuracy: better than ±(1×10 -7 ×T 0 +3ms)
1.3 Calibrate electric stopwatch
Pointer:
Input range:
Continuous: T 0 :0.1s-99999s
Trigger state: T 0 :1s-99999s
Pause state: T 0 :0.1s-99999s
Accuracy: better than ±(commercial power frequency accuracy×T 0 +0.6ms)
1.4 Calibrate millisecond counter and digital electric stopwatch
Input range: T 0 :1×10 2 μs-1×10 9 μs
Accuracy: better than ±(1×10 -7 ×T 0 +3μs)
The SF2001 calibrator is fully compliant with the mechanical stopwatch and digital quartz stopwatch calibration procedure, electric stopwatch calibration procedure, and electronic millisecond counter calibration procedure, issued by the National Metrological Bureau.

2.1 Working conditions
Voltage: 220(1±10%)V;
Frequency: 50(1±5%)Hz;
Power consumption: <60VA;
Temperature : 0~40℃;
Humidity: <80%
2.2 Mechanical characteristics
Dimension: 329mm×283mm×155mm Weight: 3.7kg
2.3 Operation characteristics: Input with keys, menu display
2.4 Display mode: LCD display,English menu
2.5 Technique: With SMT technique and large-scale IC, the calibrator is of high reliability, small volume and long service life.